Furnace.



Patented Dec. 2, I902.

E. FERRABJS.

F U R N AC E.

(Application filed. Aug. 16, 1901.

2 Sheets-Sheet l,

(No Model.)

4 w d m H i r14; mmms rzrzns $0, morn-Limo, wnwwmcn. a c.

No. l7l4,685. v 4 Patented Dec. 2, I902.

E. PERM-ms.

FURNACE.

(Apyiication ma Aug. 16, 1901.

m Mod'oL) 2 Sheets-Sheet 2-.

UNITED STATES PATENT OFFICE.

ERMINIO FERRARIS, OF MONTEPONI, SARDINIA, ITALY, ASSIGNOR OF ONE- FOURTH TO WALTER RENTON INGALLS, OF LYNN, MASSACHUSETTS.

FURNACE.

.PECIFICATION forming part of Letters Patent No. 714,685, dated December 2, 1902.

Application filed August 16,1901. Serial No. 72,249. (No model.)

To all whom it may concern: The construction of the gas-conductingflues Be it known that I, ERMINIO FERRARIS, a c d in the masonry of the furnace not only subject ofthe Kingof Italy, residing at Montepreserves the initial heat of the gas, but also 'poni, Sardinia, Italy, have invented certain enables it to become further preheated by 55 5 new and useful Improvements in Furnaces abstraction of heat from the combustion- Adapted for the Heating of Retorts for Zinc chambers of the furnace. Distillation and other Purposes, (for which The retort-furnaces are of uniform section application has been made for Letters Patent and can be constructed of any desired length. in Italy in the name of the Societa di Monte- At the center of the length of the furnace a 60 i poni,N0. 16,263, dated July 26, 1901,) ofwhich partition-wallf cuts oif the part of the lower the following is a specification. retort-chamber at the lower horizontal series The object of the present invention is to diin order to cause the gas to spread between minish the consumptionoffueland loequalize the series of the retorts.

the temperature of retort-furnaces heated by The air required for combustion enters 65 gas for the distillation of zinc from its ores. through the valve 0, (which may be of a con- The accompanying drawings represent a ventional type,) traverses the fines g and h, double furnace. the two sections on 'n of the recuperators D, Figure 1 shows a longitudinal section on and passes into the retort-chambers at their the irregular lines 1, 2, 3, and 4 of Fig. 3; extreme end on the right through the open- 70 Fig. 2, a transverse section on the irregular ings in the vaulting of the recuperators, which lines 5, 6,", 7, and 8 of Fig. 3, Fig. 3 showing correspond with the opening 0 shown on the a horizontal section through a half of the left-hand side of Figs. 1 and 3. combustion-chambers, a horizontal section The air spreads in the retort-chambers, through one recuperative chamber, and a where it meets the gas which enters through 75 horizontal section through flue leading from the openings e. The flames extend along all the recuperative chamber. the retorts from right to left, and the prod- Like letters indicate like parts throughout nets of combustion, drawn by a chimney the drawings. which communicates with the valve 0, de-

The furnace maybe single instead of (1011- scend through the openings 0 into the recu- 8o ble, as shown in the drawings, without alterperators D, in accordance with the arrows of ing the system. the drawings, pass through the fines h and The chambersAof the furnace contain each 9, and by reason of the position of the valve three series of oval retorts a. It could just 0 pass to the flue i of the chimney. (Not as well be provided with a greater number of shown in the drawings.) 85 series of retorts of a different shape-for ex- The recuperators are filled with perforated ample, with round Belgian retorts. The comor stacked bricks, which form or afford horibustible gases produced by generators or comzontal passages having no communication one ing from any other suitable source arrive at with the other, and a partition Zdivides each the furnace through the pipe B and pass the generator into two unequal sections, the 90 4o butterfly-valve b, which sends them to the larger and hotter of which an extends to the right or to the left alternately. According to vaulting which separates the recuperator the arrows in the drawings the gas is directed from the retort-chamber, and the other colder to the right; butby reversing the valve thegas chamber m or m is above the fines h h, recan be directed to the left, so as to follow a spectively. The two compartments are trav- 5 '45 course exactly similar with the one about to ersed in the opposite direction either by air be described. The gas traverses the fines c which enters at the furnace or by the prodand d between the two furnaces, and it ennets of combustion passing to the chimney. tors into the retort-chambers through open- In order to obtain an equal temperature in ings e underneath the retorts between each all the retort-chambers, the gas and air valves 1: o vertical series, with the exception of some of B and C, respectively, are reversed at equal the center series, where the holes are closed. intervals.

In order to avoid mistakes, rods '0 w of the two valves are connected together by a set of levers and chains as y e.

What I claim as my invention, and desire to secure by Letters Patent, is

1. A furnace comprising a combustionchamber and an overhead gas-inlet, arranged to introduce gas at a point intermediate between the ends of the furnace, and fines, ducts or passages constructed in the masonry of the furnace arranged to conduct the gas in opposite directions from the inlet to the combustion-chamber, and means for delivering the infiowing gas into one or the other of the fines, ducts or passages, which flues, ducts or passages are traversed solely by the combustible gas, as described, and for the purpose specified.

2. A furnace comprising a combustion chamber and an overhead gas-inl,et,'arranged at substantially the center of the length of the furnace, and fines, ducts or passages constructed in the masonry of the furnace arranged to conduct the gas in opposite directions from the inlet to the combustion-chamber, and means for diverting the inflowing gas into one or the other of the fines, ducts or passages, which fines, ducts or passages are traversed solely by the combustible gas, as described, and for the pnrpose'specified.

3. A furnace comprising a combustionchamber and a gas-inlet, arranged to introduce gas at a point intermediate between the ends of the furnace, and fines, ducts or passages arranged to conduct the gas in opposite directions from the inlet to the combustionchamber, said flues, ducts or passages communicating with ports which lead into the combustion-chamber, and which are arranged at intervals in the length of said combustionchamber, on either side of a line extending transversely through the middle of the furnace, and means for diverting the in flowing gas into one or the other of the flues, ducts or passages, which fines, ducts or passages are traversed solely by the combustible gas.

4. A furnace comprising a combustionchamber and an overhead gas-inlet, arranged to introduce gas'at a point intermediate between the ends of the furnace,and fines, d. nets or passages constructed in the masonry of the furnace arranged to conduct the gas-in opposite directions from the inlet to the combustion-chamber, and means for divertingthe inflowing gas into one or the other of the fines, ducts or passages, which flnes, ducts or passages are traversed solely by the combustible gas, together with regenerative chambers in communication with the combustion-chamber at opposite ends of said combustion-chamber, and means for reversing the direction of flow of outgoing products of combustion and incoming air through the furnace, for the purpose specified.

5. A furnace comprising a combustionchamber and an overhead gas-inlet, arranged to introduce gas at a point intermediate between the ends of the f urnace,and fines, ducts or passages constructed in the masonry of the furnace arranged in connection with the said combustion-chamber and extending in the direction of the length thereof, being arranged to conduct the gas in opposite directions from the inlet to the combustion chamber, and means for diverting the inflowing gas into one or the other of the tines, ducts or passages, which fines, ducts or passages are traversed solely by the combnstiblegas, as described,

and for the purpose specified.

6. Afurnacecomprisingcombustion-chambers and a gas-inlet, arranged to introduce gas at a point intermediate between the ends of the furnace, and fines, ducts or passages arranged in connection with the said combustion-chambers and extending in the direction of the length thereof, being arranged to conduct the gas in opposite directions from the inlet to the combustion-chambers, said fines, ducts or passages communicating with ports which lead laterallyinto the combustion-chambers,and which are arranged at intervals in the length of said com bustion-chambers, on either side of a line extending transversely through the middle of the furnace, and means for diverting the inflowinggas into one or the other of the fines, ducts or passages, which fines, ducts or passages are traversed solely by the combustible gas, for the purpose specified.

7. A furnace comprising a combustionchamber, an overhead gas-inlet intermediate between the ends of the furnace, and a number of regenerative chambers, together with means for diverting the course of the gas and the air for its combustion so that the gas and air are supplied alternately in portions of the combustion-chamber lying on opposite sides of a transverse line extending through the middle of the furnace, and appropriate fines, ducts or passages constructed in the masonry of the furnace for conduction of the gas, and regenerative chambers communicating with the said combustion-chamber at opposite ends thereof, said regenerative chambers being so arranged that the air and the products of combustion may traverse them alternately, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ERM-INIO FERRARIS.

Witnesses:

SECOND GoRLA, MAUNZI Unions. 

